Patents Examined by Eli Lieberman
  • Patent number: 4710777
    Abstract: A dish antenna structure (10) is formed from a plurality of ribs (14) which extend from near the center of the dish to its periphery, and which support antenna panels (18) between them. Each rib has an outer flexible plastic sheath having grooves (44,45) in its side edges which receive the edges of antenna panels (18) and a hollow longitudinal channel (40) within which a rigid support member (42) is fixed. The support ribs (14) and the antenna panels (18) are curved such that the anterior surface of the dish defined thereby is parabolic.
    Type: Grant
    Filed: January 24, 1985
    Date of Patent: December 1, 1987
    Assignee: Kaultronics, Inc.
    Inventor: Ross Halverson
  • Patent number: 4691207
    Abstract: Apparatus for an earth station antenna is disclosed herein including a parabolic dish antenna pivotally carried on an upper support post mounted for rotation about a vertical axis. Pivotal linkage interconnects the antenna with the upper support post for rotation about a horizontal axis. Power drive is carried in the upper support post for pivoting the antenna about its horizontal axis via the linkage while separate power drive operably couples between the upper support post and a stationary lower post for rotating the upper support post and the antenna about the vertical axis. The lower end of the lower support post is provided with a mounting recess for insertably receiving the terminating end of an upright mounting stanchion.
    Type: Grant
    Filed: September 4, 1984
    Date of Patent: September 1, 1987
    Assignee: Nissho Iwai American Corporation
    Inventor: Anthony A. Timineri
  • Patent number: 4689629
    Abstract: A surface wave microwave antenna is presented in which transmission or reception of microwave energy is effected by discontinuities in a dielectric body positioned between a central feeder element and a ground plane. When used as a transmitter, the central disc propagates surface waves in the dielectric body in expanding circles; and the discontinuities in the dielectric body act as radiating or scattering sites to couple the waves to free space. When used as a receiver, the reverse will occur.
    Type: Grant
    Filed: September 27, 1982
    Date of Patent: August 25, 1987
    Assignee: Rogers Corporation
    Inventors: G. Robert Traut, Geoff J. Wilson
  • Patent number: 4689635
    Abstract: This invention relates to an improved means of orienting parabolic dish shaped TV antennas for receiving signals from relay satellites orbiting the earth, an angle indicating means associated with antenna assembly which indicates either the angle of elevation or the complementary angle then of which is equivalent to the latitude of the antenna site plus the offset or declination angle.
    Type: Grant
    Filed: August 6, 1984
    Date of Patent: August 25, 1987
    Assignee: Allegretti & Company
    Inventor: Gene Haupt
  • Patent number: 4689634
    Abstract: A mount for supporting a feedhorn/LNA assembly in a parabolic satellite antenna is disclosed, said mount providing a sturdy support for positioning the feedhorn/LNA assembly at the focal point of the antenna and providing means for skew adjustment of the LNA probe.
    Type: Grant
    Filed: April 1, 1985
    Date of Patent: August 25, 1987
    Inventor: Michael V. Chymiak
  • Patent number: 4686535
    Abstract: A microstrip antenna system has a central two-dimensional array (preferably square having at least 16.times.16 elements) of integrally formed conductive dual slot microstrip radiator patches. A corporate-structured array of interconnected microstrip feedlines connects a common input/output r.f. signal feedpoint to each of the central array patches and also incorporates a fixed-angle phasing offset so as to steer the main lobe or beam of the overall radiation pattern off-center. The common r.f. signal input/output connection point is itself physically offset to one side of the overall composite of array elements. Auxiliary tapered amplitude linear arrays of dual slot patches also preferably extend on all sides outwardly from the periphery of the central array so as to reduce the side lobe amplitude and main lobe beamwidth of the overall radiation pattern.
    Type: Grant
    Filed: September 5, 1984
    Date of Patent: August 11, 1987
    Assignee: Ball Corporation
    Inventor: Farzin Lalezari
  • Patent number: 4683475
    Abstract: A portable lightweight folding parabolic reflector antenna for reception of microwave signals includes an axial waveguide tube which constitutes the main structural supporting member of the antenna, a ten- to fifteen-foot diameter dish mounted to the waveguide and a sub-reflector supported at the forward end of the waveguide. A low noise amplifier may be mounted to the rear end of the waveguide for amplification of the received signals. The folding dish includes a single sheet of resiliently elastic reflecting mesh supported by a radial framework of normally straight resiliently flexible spokes of tapering cross section. The spokes are pivotable by a lever system between a folded axial position and a deployed radial position.
    Type: Grant
    Filed: September 4, 1985
    Date of Patent: July 28, 1987
    Inventor: Robert A. Luly
  • Patent number: 4677443
    Abstract: A broadband high temperature radome includes a high density outer skin layer and a low density core layer made from a ceramic material selected from the group consisting of silicon nitride and barium-aluminum silicate. Silicon nitride is sintered, reaction-sintered or chemically vapor-deposited. The outer skin has a moderate dielectric constant of about 5.0 and the core layer has a low dielectric constant of about 1.8. Both dielectric constants do not sigificantly vary at temperatures up to 1500.degree. C. Low thermal expansion of the core and skin layers are matched by the thermal expansion of a base connector constructed in a laminated form of graphite/polyimide. The thickness of the core layer to the thickness of the skin layer is given by the ratio of about 15:1 where the skin layer thickness is about 0.030 inch. Polyimide resin is used for the high temperature adhesive to adhere the connector to the core and skin layers. The core layer is impregnated with a dielectric filler, if desired.
    Type: Grant
    Filed: February 2, 1981
    Date of Patent: June 30, 1987
    Assignee: The Boeing Company
    Inventors: Edward L. Koetje, Frederick H. Simpson, James F. Schorsch
  • Patent number: 4675690
    Abstract: A photoresist-type chemical etching process is used to define a computer-generated flat pattern of conductors as if a complex conical spiral had been cut apart along a straight line through the apex and laid flat. The substrate in the shape of a circular sector is bent into a cone and the radial edges are joined in a seam. The split turns of the spiral are electrically interconnected across the seam.
    Type: Grant
    Filed: May 25, 1984
    Date of Patent: June 23, 1987
    Assignee: Revlon, Inc.
    Inventor: Robert W. Hoffman
  • Patent number: 4675689
    Abstract: A horn radiator with a grooved inner surface has a mode coupler for a TE.sub.01 wave and includes four cavity resonators embedded in the grooved surface of the horn and interconnected by an annular rectangular wave guide extending around the outer surface of the horn.
    Type: Grant
    Filed: June 7, 1985
    Date of Patent: June 23, 1987
    Assignee: Messerschmitt-Bolkow-Blohm GmbH
    Inventors: Ludwig Haas, Klaus Moosmang
  • Patent number: 4675685
    Abstract: An electrically small, dual polarized, hemispherical coverage, multi-element adaptive array antenna exhibiting low VSWR and operational over an octave of bandwidth is flush-mounted with the airframe structure of high performance aircraft. The antenna is configured as a cavity type structure in the shape of a regular polygon and has a plurality of radiation elements mounted on an insulative support board, each of the elements being is connected to a respective output port for use in a multi-channel adaptive array system. The array provides broadband capability of nulling interfering sources having arbitrary polarization and spatial direction.
    Type: Grant
    Filed: April 17, 1984
    Date of Patent: June 23, 1987
    Assignee: Harris Corporation
    Inventor: Kenneth R. Finken
  • Patent number: 4675686
    Abstract: An apparatus for the stable support of a structure, such as an antenna, in a fluid medium, such as the ocean. A flotation bag supporting an antenna is stabilized by the following features, which can be used individually or in combination. A partially submerged ribbon fence supported by a submerged damper skirt dissipates the kinetic energy of the flotation bag caused by the movement of the ocean and water that encroaches upon the bag. A flexible connection between the bag and the payload enables the bag and the payload to undergo limited motion without affecting each other. Thus, the bag's motion is decoupled and totally independent of the payload. The housing which supports the payload has a flooded chamber, lowering the center of mass of the apparatus. The bottom of the flotation bag is inwardly arched, moving the bouyancy away from the center of the bottom of the bag, enhancing stability and allowing the bag to float lower in the ocean, keeping the damper skirt submerged. The payload includes an r.f.
    Type: Grant
    Filed: February 20, 1986
    Date of Patent: June 23, 1987
    Assignee: Hazeltine Corporation
    Inventors: Tyler C. Robinson, Wayne J. Sula, Roger C. Larson, William J. Wallace
  • Patent number: 4675688
    Abstract: A rate sensor, preferably comprised of a tuned gyro, has a generally cylindrical outer housing and an inner, large diameter rotary cylindrical support defining the gyro's rotary axis. The rate sensing apparatus is mounted in the volume between the outer housing and the rotary cylindrical support whereby the interior of the rotary cylindrical support defines a large diameter hollow for receiving and supporting apparatus, other than rate sensing components of the rate sensor. The rate sensor may be advantageously used with a homing device, the seeker apparatus of the device being mounted in said hollow. This produces a homing device with a high packing density and, as the rotary axis of the gyro gimbals and that of the seeker coincide, detrimental unbalance and unwanted increase in inertial movement is eliminated.
    Type: Grant
    Filed: August 22, 1986
    Date of Patent: June 23, 1987
    Assignee: NEC Corporation
    Inventors: Hirokazu Sahara, Kiyoshi Nakayama
  • Patent number: 4673947
    Abstract: A high bandwidth microwave antenna feed comprises a spigot (4) of relatively high dielectric constant protruding from a conventional hollow waveguide (3) and a generally conical member (12) of relatively low dielectric constant fitted coaxially onto, so as to expand from the protruding spigot. The base portion (2) of the conical member is silvered and constitutes a sub-reflector. In use, microwave radiation from the hollow waveguide is refracted at the spigot/conical member interface and is reflected from the sub-reflector to a facing main reflector (1). The two-part dielectric construction enables the dimensions of the sub-reflector to be reduced, thereby reducing blockage of the main reflector and increasing the bandwidth of the system.
    Type: Grant
    Filed: February 20, 1986
    Date of Patent: June 16, 1987
    Assignee: The Marconi Company Limited
    Inventor: Paul Newham
  • Patent number: 4673949
    Abstract: A radio antenna which operates over a broad frequency band, comprising a half-wave antenna tuned to a frequency beyond one cut-off frequency of the desired frequency band and a quarter-wave transformer tuned to a frequency beyond the other cut-off frequency at the other end of said band. The quarter-wave transformer acts as an impedance compensation device by canceling the reactive components of the half-wave antenna such novel reactive cancellation technique provides broadband performance while maintaining the antenna's gain and impedance characteristics.
    Type: Grant
    Filed: September 24, 1984
    Date of Patent: June 16, 1987
    Assignee: Modublox & Co., Inc.
    Inventor: Jack W. Sheriff
  • Patent number: 4673945
    Abstract: A backfire feed antenna has a parabolic reflector with a ring-focus at the reflector focal point comprising a dielectric waveguide having a stem portion and a cap portion with a pointed end and most of the stem portion inside a conducting tube along the axis of the parabolic reflector. The outer surface of the cap portion is concave outward and convex inward and covered with a conducting layer. A curve between a parabola and hyperbola defines the surface. The cap portion has a conical surface extending between an annular surface at the junction between the stem portion and the cap portion and an axially extending circumferential surface surrounding the conducting layer. The inside end of the dielectric waveguide is pointed.
    Type: Grant
    Filed: September 24, 1984
    Date of Patent: June 16, 1987
    Assignee: Alpha Industries, Inc.
    Inventor: Harry Syrigos
  • Patent number: 4673934
    Abstract: Improved radar reflector apparatus of the type comprising a collapsible and inflatable envelope surrounding a collapsible reflector array made of reflectors which, when the envelope is inflated, form a plurality of corner reflectors. The improvement resides primarily in the fact that each of the reflectors is mounted or suspended in the envelope by a string mounting network independently of the others.
    Type: Grant
    Filed: November 13, 1984
    Date of Patent: June 16, 1987
    Assignee: Gabb Corporation
    Inventors: Gene E. Gentry, John H. Bain, Jr.
  • Patent number: 4672388
    Abstract: A polarized signal receiver waveguide assembly, or feedhorn, for receiving a selected one of linearly polarized electromagnetic signals in one waveguide of circular cross-section and for launching or transmitting the selected signal into a second waveguide, the axes of the waveguides being disposed at a right angle. The first waveguide has a closed end wall, formed as a hemispherical cavity having a hemispherical concave surface. A probe comprising a signal receiver portion disposed in a plane perpendicular to the axis of the first waveguide and a launch or transmitter portion having its axis perpendicular to the axis of the second waveguide has its launch or transmitter portion mounted in a controllably rotatable dielectric rod, such that rotation of the rod causes rotation of the signal receiver portion for alignment with a selected one of the polarized signals.
    Type: Grant
    Filed: January 21, 1986
    Date of Patent: June 9, 1987
    Inventor: Fay Grim
  • Patent number: 4672386
    Abstract: An antenna suitable for the generation of a circularly polarized annular radiation pattern comprising a substrate spaced apart from a ground plane by a layer of dielectric material, the substrate being arranged to carry on one side thereof a conductive layer in which a plurality of radial slots is defined equiangularly disposed to extend outwardly from a central region of the substrate, and on the other side thereof a microstrip feed line arrangement via which the radial slots are arranged to be fed with microwave energy for the generation of a horizontally polarized radiation pattern and via which an edge slot defined between the peripheral edge of the layer and the ground plane is arranged to be fed with microwave energy for the generation of a vertically polarized radiation pattern whereby the horizontal pattern and the vertical pattern in combination afford the circularly polarized annular radiation pattern.
    Type: Grant
    Filed: January 4, 1985
    Date of Patent: June 9, 1987
    Assignee: Plessey Overseas Limited
    Inventor: Colin Wood
  • Patent number: RE32485
    Abstract: Current-flow is suppressed on the outer surface of the horn except in a small endmost region. A reflector surrounds the horn, spaced rearwardly from the mouth. A choke used for the suppression blocks current-flow between the horn and the reflector. A high degree of uniformity of the radiation pattern over a wide forward angle is achieved.
    Type: Grant
    Filed: July 26, 1982
    Date of Patent: August 25, 1987
    Assignee: Andrew Corporation
    Inventors: Richard F. H. Yang, Laurence H. Hansen